lite-youtube {
  background-color: #000;
  position: relative;
  display: block;
  contain: content;
  background-position: center center;
  background-size: cover;
  cursor: pointer;
}

/* gradient */
lite-youtube::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  background-image: url();
  background-position: top;
  background-repeat: repeat-x;
  height: 60px;
  padding-bottom: 50px;
  width: 100%;
  transition: all 0.2s cubic-bezier(0, 0, 0.2, 1);
}

/* responsive iframe with a 16:9 aspect ratio
  thanks https://css-tricks.com/responsive-iframes/
*/
lite-youtube::after {
  content: "";
  display: block;
  padding-bottom: calc(100% / (16 / 9));
}
lite-youtube > iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

/* play button */
lite-youtube > .lty-playbtn {
  width: 68px;
  height: 48px;
  position: absolute;
  transform: translate3d(-50%, -50%, 0);
  top: 50%;
  left: 50%;
  z-index: 1;
  /* YT's actual play button svg */
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 68 48"><path fill="%23f00" fill-opacity="0.8" d="M66.52,7.74c-0.78-2.93-2.49-5.41-5.42-6.19C55.79,.13,34,0,34,0S12.21,.13,6.9,1.55 C3.97,2.33,2.27,4.81,1.48,7.74C0.06,13.05,0,24,0,24s0.06,10.95,1.48,16.26c0.78,2.93,2.49,5.41,5.42,6.19 C12.21,47.87,34,48,34,48s21.79-0.13,27.1-1.55c2.93-0.78,4.64-3.26,5.42-6.19C67.94,34.95,68,24,68,24S67.94,13.05,66.52,7.74z"></path><path d="M 45,24 27,14 27,34" fill="%23fff"></path></svg>');
  filter: grayscale(100%);
  transition: filter .1s cubic-bezier(0, 0, 0.2, 1);
}

lite-youtube:hover > .lty-playbtn {
  filter: none;
}

/* Post-click styles */
lite-youtube.lyt-activated {
  cursor: unset;
}
lite-youtube.lyt-activated::before,
lite-youtube.lyt-activated > .lty-playbtn {
  opacity: 0;
  pointer-events: none;
}